TY  - GEN
AU  - Perkins,Peter Graham
TI  - Elementary molecular bonding theory
SN  - 416426808
AV  - QD461 
PY  - 1969///
CY  - London
PB  - Methuen
KW  - Chemical bonds
N1  - Distributed in the U.S.A. by Barnes & Noble; Bibliography: p. 178
ER  -